%0 Generic %A OLIVER, GRAHAME J.H. %A WILDE, SIMON A. %A WAN, YUSHENG %D 2016 %T Geochronology and geodynamics of Scottish granitoids from the late Neoproterozoic break-up of Rodinia to Palaeozoic collision %U https://geolsoc.figshare.com/articles/dataset/Geochronology_and_geodynamics_of_Scottish_granitoids_from_the_late_Neoproterozoic_break-up_of_Rodinia_to_Palaeozoic_collision/3454520 %R 10.6084/m9.figshare.3454520.v1 %2 https://ndownloader.figshare.com/files/5426213 %2 https://ndownloader.figshare.com/files/5426216 %2 https://ndownloader.figshare.com/files/5426219 %K Grampian event %K 390 Ma %K subduction zones %K 470 Ma %K ion microprobe zircon method %K Grampian Highland terrane %K Iapetus Ocean lithosphere %K lithospheric delamination %K 600 Ma %K Midland Valley Arc terrane %K 430 Ma %K 410 Ma %K lithospheric windows %K sinistrally transpressive faults %K 420 Ma %K Scottish granitoids %K Northern Highland terrane %K 455 Ma %K crustal %K Geology %X

Thirty-seven granitoids from Scotland have been dated using the sensitive high-resolution ion microprobe zircon method. Granitoids were intruded during: (1) crustal stretching at c. 600 Ma after Rodinia broke up (A-types); (2) the Grampian event of crustal thickening when the Midland Valley Arc terrane collided with Laurentia at c. 470 Ma (S-types); (3) erosion and decompression of the over-thickened Laurentian margin at c. 455 Ma (S-types); (4) subduction of Iapetus Ocean lithosphere under Laurentia starting at 430 Ma (I-types); (5) roll-back beginning at 420 Ma (I-types); (6) bilateral slab break-off and lithospheric delamination at 410 Ma (I- and S-type granites) when Baltica hard-docked against the Northern Highland terrane and Avalonia soft-docked against the Grampian Highland terrane. Far-field Acadian events at 390 Ma were recorded by I-type granites intruded along active sinistrally transpressive faults. I-types formed in lower crustal hot zones above subduction zones, whereas S-types formed in lower crustal hot zones above lithospheric windows through which hot asthenosphere had risen.

%I Geological Society of London